COMPRESSIVE SURFACE STRENGTHENING OF WHISKER REINFORCED COMPOSITES

Award Information
Agency:
Department of Defense
Branch
Defense Advanced Research Projects Agency
Amount:
$50,000.00
Award Year:
1992
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Award Id:
17766
Agency Tracking Number:
17766
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Materials & Electrochemical (Currently Materials & Electrochemical Research (ME)
7960 S. Kolb Road, Tucson, AZ, 85706
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Lori Leaskey
(602) 574-1980
Business Contact:
() -
Research Institution:
n/a
Abstract
THE DEVELOPMENT OF WHISKER REINFORCED STRUCTURAL CERAMICS WITH SUPERIOR MECHANICAL PROPERTIES HAS BEEN LIMITED BY STRENGTH CONTROLLING FLAWS WHICH ARE OFTEN PRESENT ON THE SURFACE. THE PRESENCE OF A COMPRESSIVE SURFACE LAYER IS KNOWN TO BE EFFECTIVE IN PREVENTING GROWTH OF THESE FLAWS. HOWEVER, TECHNIQUES WHICH HAVE HERETOFORE BEEN UTILIZED HAVE BEEN INEFFECTIVE IN THAT THE IMPROVEMENT IN MECHANICAL PROPERTIES IS NOT MAINTAINED TO HIGH TEMPERATURES AND THE PROCESSING EMPLOYED IS PRONE TO INTRODUCING ADDITIONAL FLAWS. THE TECHNIQUE PROPOSED HERE HAS NEITHER OF THESE DISADVANTAGES AND RESULTS IN IMPROVEMENTS IN BOTH STRENGTH AND FRACTURE TOUGHNESS TO AT LEAST 1400¿C. THIS PROCESS INVOLVES THE CONTROLLED OXIDATION OF A1(2)0(3)-ZRO(2)-SIC(W) COMPOSITES TO PRODUCE A COMPRESSIVE SURFACE LAYER ON A SAMPLE OF ANY SIZE OR SHAPE. PRESSURELESS SINTERING OF THESE COMPOSITES WILL BE INVESTIGATED SO THAT FABRICATION OF HIGH STRENGTH COMPLEX SHAPE STRUCTURAL CERAMICS WILL BE POSSIBLE. ANTICIPATED BENEFITS/POTENTIAL APPLICATIONS - THE DEVELOPMENT OF A PROCESS TO ENHANCE THE PROPERTIES OF CERAMIC COMPOSITES AND INCREASE THEIR RELIABILITY WILL RESULT IN THE WIDESPREAD USE OF CERAMICS AND COMPOSITES. APPLICATIONS FOR THESE SUPERIOR PROPERTY COMPOSITES WILL INCLUDE ARMORS, HEAT ENGINE COMPONENTS, AND LOAD BEARING STRUCTURE PARTS FOR AEROSPACE APPLICATIONS.

* information listed above is at the time of submission.

Agency Micro-sites


SBA logo

Department of Agriculture logo

Department of Commerce logo

Department of Defense logo

Department of Education logo

Department of Energy logo

Department of Health and Human Services logo

Department of Homeland Security logo

Department of Transportation logo

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government